Double-sided OLED Packaging via Edge Bending Seals
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Solution Overview
Problem
Conventional double-sided OLED display packaging methods damage the light-emitting layer due to high-temperature sealing, leading to reduced display life and poor long-term performance.
Innovation Solution
A double-sided OLED display design featuring a transparent packaging shell with bending structures on the packaging covers that adhere to the sides of the light-emitting display portions, avoiding direct contact with the light-emitting surface and using insulating layers to prevent water vapor and oxide intrusion, while forming a packaging chamber to protect the OLED layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing glue is coated on the light emitting display portion to adhere the packaging cover, then the packaging is secured, but the light emitting layer is damaged due to high temperature sealing
Solution Approach 1:
The patent applies dimensionality change by moving the sealing glue application from the surface dimension (directly on the light emitting display portion) to a side dimension (bending structure at the edge). The bending structure extends downwardly from the upper plate to contact only the side surface of the light emitting display portion, keeping the glue application area separate from the light emitting layer in the vertical dimension.
Solution Approach 2:
The patent segments the packaging cover into distinct functional parts: an upper plate for covering and bending structures at the edges for sealing. The bending structure is separated from the main upper plate and extends downwardly to contact only the side surface, creating a distinct sealing zone that is spatially separated from the light emitting layer.
2Volume of moving object
If the sealing portion is close to the light emitting layer to achieve compact packaging, then the packaging is compact, but the light emitting layer is damaged by high temperature
Solution Approach 1:
The patent uses dimensionality change by positioning the sealing function in the lateral dimension (side surface contact via bending structure) rather than the vertical dimension (close to light emitting layer). The bending structure extends downwardly from the upper plate to contact the side surface, achieving sealing through lateral proximity rather than vertical closeness.
3Ease of manufacture
If conventional packaging is used for double-sided OLED display, then the manufacturing is simple, but the display life is reduced due to light emitting layer damage
Solution Approach 1:
The patent segments the packaging cover into an upper plate and separate bending structures at the edges. This segmentation allows the sealing function to be performed by the bending structures contacting only the side surfaces, protecting the light emitting layer while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The bending structure acts as an intermediary element between the upper plate and the light emitting display portion. It provides a intermediate contact zone at the side surface, allowing sealing to occur away from the light emitting layer while still achieving secure packaging.
Data Source
AI summary
A double-sided OLED packaging structure is provided and has an upper plate and a lower plate. Edges of each of the upper plate and the lower plate has a bending structure disposed thereon. A packaging glue is disposed on an inner side of the bending structure, such that two light emitting display portions are corresponding to and connected to each other by the packaging glues and the bending structures. Therefore, the double-sided OLED packaging structure can protect an organic light-emitting layer from high-temperature damage and prolong the display life by disposing the packaging glue on a side part of the packaging cover and thus away from a light-emitting surface.